[deliverable/linux.git] / include / linux / netfilter / nfnetlink.h

#ifndef _NFNETLINK_H
#define _NFNETLINK_H
#include <linux/types.h>
#include <linux/netfilter/nfnetlink_compat.h>

enum nfnetlink_groups {
	NFNLGRP_NONE,
#define NFNLGRP_NONE			NFNLGRP_NONE
	NFNLGRP_CONNTRACK_NEW,
#define NFNLGRP_CONNTRACK_NEW		NFNLGRP_CONNTRACK_NEW
	NFNLGRP_CONNTRACK_UPDATE,
#define NFNLGRP_CONNTRACK_UPDATE	NFNLGRP_CONNTRACK_UPDATE
	NFNLGRP_CONNTRACK_DESTROY,
#define NFNLGRP_CONNTRACK_DESTROY	NFNLGRP_CONNTRACK_DESTROY
	NFNLGRP_CONNTRACK_EXP_NEW,
#define	NFNLGRP_CONNTRACK_EXP_NEW	NFNLGRP_CONNTRACK_EXP_NEW
	NFNLGRP_CONNTRACK_EXP_UPDATE,
#define NFNLGRP_CONNTRACK_EXP_UPDATE	NFNLGRP_CONNTRACK_EXP_UPDATE
	NFNLGRP_CONNTRACK_EXP_DESTROY,
#define NFNLGRP_CONNTRACK_EXP_DESTROY	NFNLGRP_CONNTRACK_EXP_DESTROY
	__NFNLGRP_MAX,
};
#define NFNLGRP_MAX	(__NFNLGRP_MAX - 1)

/* General form of address family dependent message.
 */
struct nfgenmsg {
	__u8  nfgen_family;		/* AF_xxx */
	__u8  version;		/* nfnetlink version */
	__be16    res_id;		/* resource id */
};

#define NFNETLINK_V0	0

/* netfilter netlink message types are split in two pieces:
 * 8 bit subsystem, 8bit operation.
 */

#define NFNL_SUBSYS_ID(x)	((x & 0xff00) >> 8)
#define NFNL_MSG_TYPE(x)	(x & 0x00ff)

/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS()
 * won't work anymore */
#define NFNL_SUBSYS_NONE 		0
#define NFNL_SUBSYS_CTNETLINK		1
#define NFNL_SUBSYS_CTNETLINK_EXP	2
#define NFNL_SUBSYS_QUEUE		3
#define NFNL_SUBSYS_ULOG		4
#define NFNL_SUBSYS_OSF			5
#define NFNL_SUBSYS_COUNT		6

#ifdef __KERNEL__

#include <linux/netlink.h>
#include <linux/capability.h>
#include <net/netlink.h>

struct nfnl_callback
{
	int (*call)(struct sock *nl, struct sk_buff *skb, 
		struct nlmsghdr *nlh, struct nlattr *cda[]);
	const struct nla_policy *policy;	/* netlink attribute policy */
	const u_int16_t attr_count;		/* number of nlattr's */
};

struct nfnetlink_subsystem
{
	const char *name;
	__u8 subsys_id;			/* nfnetlink subsystem ID */
	__u8 cb_count;			/* number of callbacks */
	const struct nfnl_callback *cb;	/* callback for individual types */
};

extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);

extern int nfnetlink_has_listeners(unsigned int group);
extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, 
			  int echo, gfp_t flags);
extern void nfnetlink_set_err(u32 pid, u32 group, int error);
extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);

extern void nfnl_lock(void);
extern void nfnl_unlock(void);

#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
	MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))

#endif	/* __KERNEL__ */
#endif	/* _NFNETLINK_H */
Commit	Line	Data
f9e815b3 HW	1	#ifndef _NFNETLINK_H
	2	#define _NFNETLINK_H
	3	#include <linux/types.h>
df6fb868	4	#include <linux/netfilter/nfnetlink_compat.h>
ac6d439d PM	5
	6	enum nfnetlink_groups {
	7	NFNLGRP_NONE,
	8	#define NFNLGRP_NONE NFNLGRP_NONE
	9	NFNLGRP_CONNTRACK_NEW,
	10	#define NFNLGRP_CONNTRACK_NEW NFNLGRP_CONNTRACK_NEW
	11	NFNLGRP_CONNTRACK_UPDATE,
	12	#define NFNLGRP_CONNTRACK_UPDATE NFNLGRP_CONNTRACK_UPDATE
	13	NFNLGRP_CONNTRACK_DESTROY,
	14	#define NFNLGRP_CONNTRACK_DESTROY NFNLGRP_CONNTRACK_DESTROY
	15	NFNLGRP_CONNTRACK_EXP_NEW,
	16	#define NFNLGRP_CONNTRACK_EXP_NEW NFNLGRP_CONNTRACK_EXP_NEW
	17	NFNLGRP_CONNTRACK_EXP_UPDATE,
	18	#define NFNLGRP_CONNTRACK_EXP_UPDATE NFNLGRP_CONNTRACK_EXP_UPDATE
	19	NFNLGRP_CONNTRACK_EXP_DESTROY,
	20	#define NFNLGRP_CONNTRACK_EXP_DESTROY NFNLGRP_CONNTRACK_EXP_DESTROY
	21	__NFNLGRP_MAX,
	22	};
	23	#define NFNLGRP_MAX (__NFNLGRP_MAX - 1)
f9e815b3	24
f9e815b3 HW	25	/* General form of address family dependent message.
	26	*/
	27	struct nfgenmsg {
60c195c7 AB	28	__u8 nfgen_family; /* AF_xxx */
60c195c7 AB	29	__u8 version; /* nfnetlink version */
98a4a861	30	__be16 res_id; /* resource id */
53e26658	31	};
f9e815b3	32
080774a2	33	#define NFNETLINK_V0 0
f9e815b3	34
f9e815b3 HW	35	/* netfilter netlink message types are split in two pieces:
	36	* 8 bit subsystem, 8bit operation.
	37	*/
	38
	39	#define NFNL_SUBSYS_ID(x) ((x & 0xff00) >> 8)
	40	#define NFNL_MSG_TYPE(x) (x & 0x00ff)
	41
0ab43f84 HW	42	/* No enum here, otherwise __stringify() trick of MODULE_ALIAS_NFNL_SUBSYS()
	43	* won't work anymore */
	44	#define NFNL_SUBSYS_NONE 0
	45	#define NFNL_SUBSYS_CTNETLINK 1
	46	#define NFNL_SUBSYS_CTNETLINK_EXP 2
	47	#define NFNL_SUBSYS_QUEUE 3
	48	#define NFNL_SUBSYS_ULOG 4
11eeef41 EP	49	#define NFNL_SUBSYS_OSF 5
11eeef41 EP	50	#define NFNL_SUBSYS_COUNT 6
f9e815b3 HW	51
	52	#ifdef __KERNEL__
	53
080774a2	54	#include <linux/netlink.h>
f9e815b3	55	#include <linux/capability.h>
df6fb868	56	#include <net/netlink.h>
f9e815b3 HW	57
	58	struct nfnl_callback
	59	{
f9e815b3	60	int (call)(struct sock nl, struct sk_buff *skb,
df6fb868	61	struct nlmsghdr nlh, struct nlattr cda[]);
e3730578 PM	62	const struct nla_policy policy; / netlink attribute policy */
e3730578 PM	63	const u_int16_t attr_count; /* number of nlattr's */
f9e815b3 HW	64	};
	65
	66	struct nfnetlink_subsystem
	67	{
	68	const char *name;
7c8d4cb4 PM	69	__u8 subsys_id; /* nfnetlink subsystem ID */
	70	__u8 cb_count; /* number of callbacks */
	71	const struct nfnl_callback cb; / callback for individual types */
f9e815b3 HW	72	};
f9e815b3 HW	73
7c8d4cb4 PM	74	extern int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
7c8d4cb4 PM	75	extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
f9e815b3	76
a2427692	77	extern int nfnetlink_has_listeners(unsigned int group);
f9e815b3	78	extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group,
e34d5c1a	79	int echo, gfp_t flags);
dd5b6ce6	80	extern void nfnetlink_set_err(u32 pid, u32 group, int error);
f9e815b3 HW	81	extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);
f9e815b3 HW	82
e6a7d3c0 PNA	83	extern void nfnl_lock(void);
	84	extern void nfnl_unlock(void);
	85
0ab43f84 HW	86	#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
	87	MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
	88
f9e815b3 HW	89	#endif /* __KERNEL__ */
f9e815b3 HW	90	#endif /* _NFNETLINK_H */